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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Monday, 16 April 2007
(at 16:15 in room H 34)
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Shot noise: From Schottky to Bell

Markus Büttiker

Düpartement de Physique Theorique
Universite de Geneve
   






The theoretical and experimental investigation of current fluctuations is one of the most active fields of mesoscopic physics.
We present a discussion of current cross correlators in mesoscopic conductors. Making an analogy to the optical Hanbury Brown Twiss experiment we discuss how quantum statistical effects and two-particle interference effects can be investigated with current cross correlations.
In particular we propose a geometry where first order interference effects (in conductance) are absent but shot noise correlations due to two particle physics exhibits an Aharonov-Bohm effect. In this geometry, the two particle Aharonov-Bohm effect is a direct indicator of orbital electron-electron entanglement. The visibility of the two particle Aharonov-Bohm effect determines the degree to which a Bell inequality can be violated.
We discuss quantum state tomography as means to evaluate arbitrary entanglement measures. We illustrate the theory with related experimental work.

Within the Physikalisches Kolloquium

last modified: 2018.10.24 Mi
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